I was taught to use QFE when I did my PPL. Then I went on to do the IMC rating and was taught to use only QNH. Then I went to the USA and did a load of flying, and soon realised that there can't be a QFE for a lot of airfields there.
I don't use RPS (there's always a QNH to be had, in my experience), and I don't use QFE. Somehow, my poor brain copes.
On an IMCR or IR renewal, failure to set QNH on the missed approach is an automatic "fail", which is another good reason not to use QFE.